package lc_3128_直角三角形;

public class Solution {
    public static void main(String[] args) {
        String a = "12345678";
        char[] b = a.toCharArray();
        b[4] = (char) 128;
        System.out.println(new String(b));
        int c = 128;
        System.out.println(Integer.toHexString(c));
    }
}